#include <string>
using namespace std;
class clztest
{
private:
    /* data */
    int a;
public:
    clztest(/* args */);
    clztest(int a);
    ~clztest();
};

class student
{
private:
    int age;
    string name;
    /* data */
public:
    student(/* args */);
    ~student();
};

